Device for simultaneously ruling a plurality of lines

Claim 1

A WRITING DEVICE COMPRISING, IN COMBINATION, AN ADAPTER UNIT HAVING A FIXED WRITING ELEMENT WITH A WRITING POINT, AN ELONGATED CHAMBER WITH AN UPPER SHOULDER AND A LOWER SHOULDER ON EACH ELONGATED SIDE AND SLOTS IN EACH ELONGATED SIDE, AND A CHANNEL BETWEEN SAID FIXED WRITING ELEMENT AND SAID ELONGATED CHAMBER; A WRITING INSTRUMENT INSERTED INTO THE CHANNEL AND HAVING ITS SINGLE WRITING POINT ADJACENT TO THE WRITING POINT OF THE FIXED WRITING ELEMENT; A MOVABLE WRITING ELEMENT POSITIONED WITHIN THE CHAMBER IN SLIDABLE CONTACT WITH THE UPPER SHOULDER AND LOWER SHOULDER ON EACH ELONGATED SIDE OF THE CHAMBER AND HAVING PINS EXTENDING THROUGH THE SLOTS IN EACH ELONGATED SIDE OF THE CHAMBER, SAID MOVABLE WRITING ELEMENT HAVING A FLANGE AND BEING FIXEDLY BUT MOVABLY POSITIONABLE WITH ITS WRITING POINT AT EITHER OF TWO SPECIFIC DISTANCES FROM THE WRITING POINT OF THE WRITING INSTRUMENT IN THE PLANE ENGAGED BY BOTH THE WRITING POINT OF THE WRITING INSTRUMENT AND THE WRITING POINT OF THE FIXED WRITING ELEMENT OR WITH ITS WRITING POINT ABOVE SAID PLANE; A SPRING SURROUNDING A PORTION OF THE MOVABLE WRITING ELEMENT AND EXTENDING FROM THE FLANGE OF THE MOVABLE WRITING ELEMENT TO THE UPPER SHOULDER ON EACH ELONGATED SIDE OF THE CHAMBER; AND A GUIDE INTEGRALLY ATTACHED TO THE MOVABLE WRITING ELEMENT AND HAVING A SURFACE WHICH IS PERPENDICULAR TO A STRAIGHT LINE EXTENDING THROUGH THE WRITING POINTS OF THE FIXED WRITING ELEMENT, THE WRITING INSTRUMENT, AND THE MOVABLE WRITING ELEMENT.